Combined typewriting and computing machine



H. L. PITMAN.

COMBINED TYPEWRITING AND COMPUTING MACHINE. APPLlcAloN FILED `JAN. 23. 191s.

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COMBINED IYPEWRITING AND COMPUTING MACHINE.

APPLICATION FILED IAN. 23. I9I8. 1,345,87"7'.A Patented July 6, 1920.

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H. L. PITIVIAN. l

COMBINED TYPEwRlTING AND COMPUTING MACHINE.

APPLICATION FILED IAN. 23, I9I8.

Patented July 6, 1920..

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H. L. PIIMAN.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

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APPLICATIUN FILED IAN. 23. 19H3. 1,345,877, Patented July 6,

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H. L. PITMAN.

COMBINED TYPEWRITING-AND COMPUTING MACHINE.

APPLICATIQN FILED JAN. 23 |918.

Patented July 6; 1920.

MM/g BY H. L. PITIVIAN.

CDNIBINED TYPEWRIIING AND COMPUTING MACHINE.

APPLICATION FILED IAN. 23. 1918.

Patented July 6, 1.9%..

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HENRY L. PITMAN, EAST ORANGE, NEWl `JERSEY, ASSIGNOR TO UNDERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

Specification of Letters Patent.

Patented July 6,19201 Application filed January 23, 1918. Serial No. 213,279.

To (1N who/n 'it may concern.'

lie itknown that I, HENRY L. PITMAN, a citizen of the United States, residing in last Orange, in the ooiinty of Essex and State of N ew Jersey, have invented certain new and useful Improvements in Combined 'l`ypewriting and Computing Machines, of which the following is a specification.

)ly invention relates to combined .typewriting and computing machines, and certain features thereof relate to machines which not only compute vertical columns but also compute crosswise of said columns.

ln such machines, of which the ,Underwood Addendagraph is an example, there are usually provided for this purpose two computing units, a column-computing unit and a cross-computing unit. The column-computing unit comprises a relativelystationary7 master wheel, which is traversed by one or more column-totalizers, the latter havingr computing wheels with which the. master wheel engages .eef/victim. For this relative travel thc totalizers are secured to the typewriter carriage. The cross-computing unit also has a relatively-stationary master wheel; and the cross-totalizer, which comprises computing wheels. is

mounted on a sub-carriage and is adapted to traverse said master wheel. The crosstotalizer travels intermittently during the run of thetypcwriter carriage; so that when a columntotali zer passes through a computing zone` the computation may be effected not only in the column-totalizer but also in the cross-totalizer. To effect this intermittent travel. pick-up .elements are provided. each of which bears such a relatiom to its corresponding column-totalizei that immediately priorfto the entrance of the' latter into the computing zonel the pickup element connects the cross-totalizer carriage with the typewriter carriage. to travel with the latter'. As the column-totalizei passes out of the computing zone, the crosstotalizer carriage becomes released from the typewriter carriage by the disengagement` of the pick-up hook from the pick-up dog, thus permitting the cross-toltalizer carriage to jump back to its normal position.

One of the objects of my invention is to i simplifyand improve the mechanism of trated and described in my co-pending ap-y plication, Serial No.` 186,098, filed August 14. 1917. yAnother.l object is to perform eertain operations automatically.

In said application 186,098, is shown a train of mechanism extending from the column-computing master wheel to the crosscomputing master wheel. and a manual control to make or break said connection, for rendering the .master wheel of the crosscomputing unit effective or ineffective. Further, there is shown a non-compute key, which renders both computingunits ineffectivcythis being done by breaking the connection between the numeral keys and the master wheel of the column-computing unit. i

A feature of kmy invention is to automatically render the master wheel of thel crosscomputing unit effective when a cross-computation is to 'be effected. To do this, the connection between the master wheels may be normally broken and may be made effective automatically immediately prior to the entrance ofl a columns-totalizer into the computingv zone.

The means for making' and breaking this connection is preferably controlled by. the

typewriter carriage, and may comprise a the computing Zone. This locking means is in the nature of a rail which extends along in front of the machine and traversed by the column-totalizers. the rail occupying one of the notches in each of the wheels. The range of travel of the totalizers lextends sometimes considerably beyond the sides of the machine frame. thus presenting the diticulty that the locking rail or bar would have to be made o't such a length that it, would project objeetionably beyond the sides ot' the machine trame. locking bar occupy as short a space as possible. I have shown it as formed in three sections, viz., a fixed section and two normally-retrzurted sections. one at each end ot the tixed section. Either movable section may be extended to keep the computing wheels locked when a totalizer movesl beyond the end ot the fixed section of the locking rail or bar.

The extending oti the sections ot the locking bar may be done automatically by the typewriter carriage. and tor this purpose the traveling totalizers may engage with projections on said movable sections. To return the sections to their normal positions. each is provided with a spring.

l have further provided a locking element. in the torni of a rail or bar to prevent accidental rotative displacement. of computing wheels ot the cross-totalizer. be eti'ective when the cross-totalizer is in normal position. and the cross-computing wheels may be treed ot said locking rail as the totalizer moves step by stepy through the computing zone. aty which time the computing wheels are brought one by one into engagement with both the master wheel and a set of carry-over pinions.

lt is sometimes desirable to subtract in the cross-computing unit when adding in the column-con'iputing unit. and vice versa. To do this I have provided simplilied and improved means. including a special key. and an indicator plate Iwhich may cooperate with an indicator having the word heverse thereon. denotingr the direction in which to move the key to change the. state o'l" the cross-coniputing unit only` so that a conij'mtation'may be etTected thereby. which is the reverse ol that ot' the columncomputing unit. irrespective ot the kind ot computation being done by the latter.

ln said co-pending application No. 186.005. l have shown sjning-pressed pawls associated with carry-over detents to prevent accidental displacement of carry-over pinions of the computing units. l have also shown therein cams on tht` totalizers. which depress the pawls to t'ree the car1 vover detents as the carriage passes through a computing zone. Since this torm ol release for the carry-mer detents has a tendency to burden the spring drum ot the typewriter carriage. l have devised a kind of lock tor the carry-over detents otl one ol' the computing'units (preferably the cross-computing unit). which will automatically 'free the earry-over detents as the carriage passes through a computing zone. without adding to the work done by the spring drum. (,)ne

To have the The rail may` form of this new lock mans may colnprise an element'. in the torni ot a bar. normally locking the detents. This bar traversesthe detents. and rel xases them one by one. as the totalizer traverses the computing zone. For this purpose the bar is preferably secured to the cross-totalizer carriage.

l have found it possible to make provision tor attaching the cross-totalizer to the subcarriage irrespective ot the width oll the iormer, which may have diti'erent denominational capacities. An indicator aids in positioning the cross-totalimr relatively to the sub-carriage so that the lowest denominational position ot' the cross-totalizer always bears a definite relation to said subcarriage. The locking bar. just re'l'erred to. is adjustable relatively to the cross-totalizer. so as to allow for dill'erent widths ol the latter. so that the locking bar may al ways bear a definite relation to the position ol' the highest denomination ol' the cross-totalizer.

For rendering the column-computing master wheel ineliective. l have provided a disconnect-tlevice which is shown in the form ot' a rotatable finger-piece and a bar actuable thereby to unmesh gear wheels. which torni part ol the driving mechanism for the master wheel. Vlihe lingenpiece is provided with indications. which may be viewed through a sight-opening. to indicate the setting ot the connections to the master wheel.

The typewriter carriage may be quickly brought to any lenominatiomxl position in any column. so as to properly position the totalizer.relatively to the master wheel` by means ot' tabulating mechanism including column-stops. 'l`hese stops may be set individually to ell'ective positions by a key at the keyboardotI the machine.

The pick-up elements or dogs l'or the cross-compating unit may be similar in construction to that ot' the column-stops and may he set simultaneously with the columnstops. lt is sometimes desired, however. to usethekeytosetthecolumn-stopsonly. l `or this purpose l have provided simple and improved.means whereby the etl'ect ol' the key may be changed. to set only the columnstops. or the colunmstops with the pick-up elements. at will.

Other t'eatures and advantages will hereinat'ter appear.

ln the accompanying' drawings.

Figure l is a side view ot' the machine with parts broken away to show the interior structure.

Fig. 2 is a front view olf the machine.

Fig. 3 is a sheleton. persptwtive view olt the machine. viewed from the side opposite to that of'Fig 1.

Fig. 4 is a side view ot' the connection between the column-Computing unit and the cross-computing unit, showing some of the driving mechanism for the master wheels of both units.

Fig. 5 is a similar view, showing the carry-over devices associated with the computing units.

Fig. 6 is a fragmentary rear view, showing part of the'. connection, comprising the pick-up hook, f between the crosstotalizer and the typewriter carriage.

Fig. 7 is a front view of the connect-disconnect key associated ywith the master wheel ofthe column-computing unit, parts controlled thereby being shown in their c'onnected position.

Fig. 8 is a perspective view of the same, showing more clearly a manually-operated slide under the control of the disconnectkey and the connection between said slide and the gearing connected with the master wheel.

Fig. 9 is a view, as seen from the left- Ahand side of the machine, of the reverse handle associated with the cross-computing unit.

Fig. 10 is a perspective view, showing one showing the carry-over pinions of the cross-` computing unit, the locking pawls associated therewith and the. locking bar associated with said pawls.

Fig. 12 is a fragmentary front -view of `the cross-totalizer, showing the automatic control to connect or disconnect the driving mechanism for the master wheel of the cross-computing unit with that of the column-computing unit.

Fig. 13 is an enlarged detail side view, showing the relative locking position of a computing wheel, the locking-bar and one of its retracted sections.

Fig. 14 is a diagrammatic side viewshowing a column-stop and a pick-up dog being set simultaneously.

Fig. 15 is a similar view showing only the column-stop as being set, and some of the mechanism for` setting the pick-up dogs as rendered ineffective by a suitable control lever.

Alphabet keys 15 and numeral keys 16, when depressed, swing key-levers 17 to rock bell-cranks 18 about a fulcrumrod 19, to swing type-bars 20 upwardly and rearwardly abouta fulcrum 21, to cause types 22 to strike against the front side of a rotatable platen 23. The platen 23 is mounted for line-spacing movements, of a work-sheet, not shown, on a carriage 24, which travels back and forth on a front rail 25 and a rear rail 26.

For its letter-feeding movements, the carriage 24 is provided with a feed-rack 27, which meshes with a lpinion 28 to rotate the latter. The pinion 28 is connected to rotate an escapement wheel 29 by the usual oneway acting pawls 30. y.The escapement wheel 29 is provided with teeth 31, which cooperate with a loose dog 32 and a fixed dog 33 on a dog-rocker 34 when the latter is vibrated by a universal bar 35, engaged by heels 36 of the 'type-bars 2O when the latter approach the printing point. The upper end of the dog-rocker is returned to its forward or normal position, as in the Underwood typewriter, by the usual springs (not shown).

The carriage 24 may be moved to bring any denominational position of a` column on the platen to the printing point. To do this, there is provided a series of tabulatorkeys 37, any one of which, when depressed, swings an associated lever 38 to move a plunger 39 to bring the vupper end thereof, comprising a denominational stop 40, into the ,path of effectively-set column-stops 41 on a stop-bar 42 secured to the typewriter carriage by a bracket 43. The usual rackreleasing means (not shown in the drawings) may be actuated by any one of the plungers 39 to effect the releasing of the carriage by raising the rack 27 out of engagement with the escapement pinion 28 during the latter part of the upward movement of the plunger 39. The usual spring drum 44, after releasing the rack 27 from the escapement pinion 28, moves the carriage to the left until it is arrested by one of the effective column-stops coming into engagement with lthe denominational stop 40 on the projected plunger. The tabulator-key is then permitted to return to normal position, thus effecting a rengagement between the feedrack 27 and pinion 28.

Computing may be accomplished by the numeral keys 16, each being provided with a differential indexing or valuating cam 45. These cams vary in form, and, when actuated, copcrate with a bail 46, normally connected to a differential oscillator 47, to move theV latter through different angular distances, corresponding to values from 1 to 9. The bail 4G is secured to a shaft 48, which forms a pivot therefor. rllhe oscillator, when moved by the bail, pulls downwardly on a link 49 (Figs. 1 and 4), the upper end of which is connected to an arm 50 to rock af shaft 51, to which it is secured near the right-hand vside of the' machine. The rockshaft 51 extends into an actuator 52 of a collunil-computing unit 53, and is provided at its inner end with a downwardly-projecting arm 54, which, when the rock-shaft is for the various distances, according to the amount of movement imparted to the oscillator by the actuated nume 'al key. The

)inion 57 is fixedl f secured to a 0fear-wheel l e 58, so that the latter rotates therewith to transfer rotative movement to an intermediate pinion 59 (Fig. 2), the latter having a similar pinion 60, secured thereto, which meshes with a pinion 61 to rotate a master tions of the typewriter carriage and may besecured to a bar 68, connected to the typewriter carriage by suitable arms 69 so as to travel with the typewriter carriage, said bar being guided in its traveling movements by a suitable rail 70. As the typewriter' carriage with a totalizer enters the computing zone, the transfer'whee'l 66, associated with the dial-wheel. 64 of the highest denominational position in the computinghead 68, is brought into effective relation with the master wheel 62. If a numeral key is depressed, while'the totalizer is in this posi tion, a movement will be transferred to said dial-wheel, through the intermediary of the driving rack 56, corresponding in value to the digit of the actuated numeral key. It will be remembered that during the actuation of the numeral key, the carriage escapevment is also actuated, as hereinbefore described, thus permittingthe typewriter carriageto move to the next letter-space position at the end of the return stroke of the numeral key, to thus bring the transfer wheel associated with the dial-wheel of next lower denomination into effective relation with the master wheel.

The driving rack 56 is moved out of engagement with the pinion 57 when it has reached the end of its forward movement. .For this purpose, it is sidably mounted on studs 71 and 72 projecting laterally from bell-cranks 73 and 74, respectively, Fig. 4.-; the bell-cranks being connected to each other by a link 75, so that they move in parallelism when actuated to lower the driving rack 56 out of engagement with the pinion 57. The extent of forward movement, it will be remembered, is dependent upon the valuating cam L15 associated with the numeral key actuated at this time. During the latterfpart of the movement of the type-bar 20 to its printing position, it will be remembered, the

heel 36 thereon engages with the universal bar 35 to move the latter rearwardly to actuate the escapement devices comprising the dog-rocker To actuate the driving rack-shifting or lowering mechanism, the universal bar when thus moved swings a frame 76, to which it is pivotally connected at 77, Fig. 1; the frame 76 having` a rock-shaft 78 which serves as a pivot therefor. The forward end of an arm 79, extending downwardly fronthe rock-shaft 7S, engages with an arm 80 located near the center of the machine and secured to a rock-shaft 81 extending from side to side of the machine. The rock-shaft 81 has at its left-hand side an arm 82 which moves a link 83 connected to an arm 84 to rock a shaft 85 to which it is secured. The rock-shaft 85 has secured thereto a downwardly-projecting arm 86 which is located near the left-hand side of the actuator 52, and which, when the rock-shaft 85 is actuated, moves a link 87 to rock a shaft 88, to which it is connected by means of an arm 89 extending from the rock-shaft 88. The rock-shaft 88 has secured thereto a cam 90 which is rotated therewith and engages with a forked arm 91 secured to a rock-shaft 92 to rock the latter.

It will be seen by an inspection of Fig. 4c that the bell-crank 73 of the parallel motion mechanism is also mounted on the shaft 92 to which .it is secured. Therefore, this movement of the shaft 92, in a counterclockwise direction, is effective to rock the bellcrank 73 to lower the studs 71 and 72; the bellrank 74, which is loosely mounted on the1'ock-sl1aft S5, being actuated by the bell-crank 73 through the'intermedi'ary of the connecting link 75.

rlhe driving rack 56 during its return stroke may be held out of engagement with the pinion 57, preferably in a manner sliowu and described in my co-pemling application, Serial No. 24,390, filed April 28, 1915, (now Patent No. 1,308,506, dated July 1, 1919). This mechanism comprises a latch (not shown), which is rendered effective at the end of the forward movement of the rack to hold it out of engagement with the pinion, and remains effective until the latter part of the return stroke of the rack, when the arm 54 renders said latch ineffective, thus permitting the rack to rengage the pinion 57.

The gear-wheel 58 is held against accidental displacement, while it is out of mesh with the pinion 5.7, during the return Inovement of the driving rack 56, by ay pawl 93,'

which is normally out of engagement with the gear 59, but. is swung into vengagement therewith by means of a cam 94 during the rocking movement of the rockshaft 85'; the cam 94; being rigidly secured, for this purpose, to said rock-shaft. The pawl 93 also 95 relatively to their teeth.

serves to accurately position the gear-Wheel 5 8, so as to assist in aliningrthe teeth of the master wheel 62 relatively to those of the transfer Wheels 66 after each movement thereof. i

Tens-carry-over mechanism is provided for the column-computing unit. This is contained Within the actuator 52, and comprises a series of carry-over pinions 95, which are placed adjacent to the master Wheel 62; the carry-over pinions 95 being mounted on a shaft 96, with the teeth of all of the pinions in alinement with those of the master Wheel, so that the master wheel and carry-over pinions may readily be traversed by the computing wheels 66 to be brought into coperative relation therewith.

The carry-over pinions 95 and the transfer Wheels 66 may functionate, during a tens-carry-over operation, in a manner` similar to lthat illustrated and described in my co-pending application, hereinbefore-mentioned, Serial No. 255390. The carry-over pinions 95 are normally prevented from rotating by detents 97, which are held against said pinions by spring-pressed bell-cranks 98. The bell-cranks 98 are depressed one at a time by a cam 99 on the totalizer 63 as the latter passes step by step through the computing zone. This is done to release the carry-over det'ents 97, and consequently the carry-over pinionsi95, so that any one of the latter may be moved to effect a tens carry-over from one dial-Wheel to another. The carry-over detents 97 are also adapted to assist in alining the carry-over pinions This ma. Y be done by a cam 100, secured to the rock-shaft 8S. which is rocked every time a numeral key is actuated, to engage with tails 101 eX- tending downwardly from the detents-97 to slightly swing the detents 97 about a. supporting rod 102, upon which they are pivotall)v supported, to foice .the upper end of he detents into the spaces between'lthe teeth pf the carry-over pinions 95. v'similar to the ycarry-over detents 97 is pro- A detent 103 vided for the master vwheel 62. This detent may also serve to aline the teeth of the master wheel `vvith those of the carryover pinions; the detent 103 being for this purpose provided with a tail 104, which is actuated .by the cam 100, to swing the detent about the rod 102 and force the .upper end of the detent between the teeth of the master wheel. and the master-Wheel detent 103 may be assisted, in their return movement by a universal bar 105, which is pivotally mounted on the rod 102 and is pressed against tails 106v and 107, respectively, of the carry-over detents`97 and the master-Wheel detent 103, by a spring 108. f

To 'prevent accidental displacement of the computing wheels 66, which would cause The carry-over detente 97" a displacement of the dial-Wheels 64, there is provided a locking bar 109, having portions shaped to conform with the space, where they may engage, between the teeth on the computing Wheels or transfer Wheels 66. This locking bar extends along the front of the machine frame 110 and beyond the sides of the machine frame 110, and is shaped at' itsupper end to conform to the spaces between the teeth on the transfer wheels 66, and preferably below the columntotalizers, so that the computing Wheels thereof may traverse the locking bar 109, to prevent accidental rotation thereof. The locking bar 109 is provided with a gap at the computing zone, in which the carry-over pinions and the master wheel are located; the uppermost teeth of the carry-over pinions'and the master Wheel being in alinement with the locking bar 109, so that as soon as a totalizer enters a computing zone,

the computing Wheels 66 leave the locking bar, one at a time, to be brought intoeffec tive relation with the master Wheel and the carry-over pinions. Vhen the totalizer passes out of a computing zone, the transfer Wheels again engage with the locking bar 109.

To have the locking bar 109 occupy a minimum space crosswise of the machine, I have provided at the ends of a fixed main section 111 of the Alocking bar, normally-retracted movable sections 112 and 112, which may be extended to maintain the transfer wheels 66 locked when the totalizer travels beyond the ends of the main section 111. To do this, I have found it advantageous to locate the sections 112 and 112n of the locking bar 109 in back of the `main section 111 (Figs. 10 and 13). Each section may be guided ina slot 113 formed in the main section 111, and held in its retracted position by means of a return spring 114, connected to a pin 115 on the main section 111, the other end of the spring being connected to a pin 116 securedl to the section 112. The springs 114 may be concealed in slots 117 foimed in the under side of the sections `112 andl 112a, and may be el'ective to hold the sections 112 and 112a against shoulders 118 there being lugs 119, projecting from the movable sections, which engage with said shoulders 118. The movable sections are shaped to tit t-he space between teeth of the computing Wheels 66; the engaging portions thereof being located one-tooth-space distance in back of those of the fixed section 111. -If the typewriter carriage is moved to one side a sufficient ldistance to bring one of the tot-alizers beyond the end of the fixed section 111 of the locking bar 109, a projection 120 on the totalizer 63 engages with the lug 119to project the latter to move the section 112 or 112'L1 with the totalizer, thus main'` taining the 4transfer wheels locked after they beveledl edges 122. f

The column-computing unit 531s adapted to perform addition or subtraction. This includes a state-setting mechanism similar to that disclosed in my hereinbefore-mentioned co-pending application, 'Serial No. 186,098, A

and may comprise an add ke 123 and a sub key 124 to set the machine to addition and subtraction, respectively. As seen in Fig. 2, the add key 123 is shown in vits depressed position, thus indicating that the computing mechanism is set for addition. It will also be seen that the gear-wheel 53, When the key 123 is in this position, meshes With the pinion 59 secured to the pinion 60, the latter meshing with the pinion 61, so that the master Wheel 62 may be driven in a clockwise direction, as viewed in Fig. 1.

If it is desired to change the state of the actuator 52 to subtraction, the subtraction key is depressed to move the gear wheel 58 out of engagement With the pinion 59 and connect directly with the pinion 61. Thus, when the gear wheel 53 is actuated, the master Wheel will be rotated in a counter clockwise direction to rotate the computing Wheels 66 and the dial Wheels 64 to subtract.

rThe state-setting nichanism for shifting the gear Wheel 53 to render the actuator 52 eifective for addition or subtraction comprises ashaft 125, Figs. 2 and 3, which may be rocked in either direction by means of the keys 123 and 124 to swing an arm 126 projecting downwardly from the rock shaft 125 the arm 126 being connected by means of a link 127 to an arm 128 projecting downwardly from a rock shaft 129,` the latter, when rocked, moving an upwardly-projecting arm 130 connected `by a link 131 to operate a reverse lever 132 3). r1`he reverse lever 132 coperates with tvvo cams 133, 134 on opposite sides of a bracket 135 (Figs. 1 and 3), in a manner clearly shown and described in my said co-pending` application, Serial No. 136,093, filed August 14', 1917, to shift a shaft 136 on which the gear Wheel 53 is mounted. The cam slides 133 land 134 may engage with the conical surfaces of a pair of bevel pinions 137 and 133, rigidly secured to the shaft 136. '1V o hold the state-setting mechanism in either one of the two positions, there is provided a springactuated detent 139 (Fig. coperating withan arm 140 secured to the rock shaft 129.

The cross-computing unit 141 comprises a cross-totalizer 142 and an actuator 143. The cross-totalizer 142 travels intermittently With the typewriter carriage 24 through a computing zone, in a manner to be presently described, so that the cross-total of the igures Written in predetermined columns may' be registered on the cross-totalizer 142.

The actuator of the cross-computing unit comprises a master wheel 144, which may be connected to the` driving rack 56 of the master Wheel 62. This connection comprises the shaft 136, which is effective to rotate the pinion or bevel gear 138 secured thereto. The pinion 138, When the mechanism is set for addition7 as in Fig. 2, meshes with the pinion or bevel gear 145 to rotate a vertical shaft 146, suitably journaled both in the bracket 135 and a bracket 147, and having at its lower end a bevel gear 143, which drives a pinion or bevel gear 149 connected in driving relation with a horizontal shaft 150, Fig. 1.k The horizontal shaft 150 has secured thereto a gear Wheel 1511. similar to the gear Wheel 58 of the columncomputing unit. This shaft 150, when ro- ."tated, rotates a pinion 152 through the intermediary of the gear Wheel 151; the pinion 152 being connected to a similar pinion 153, the latter meshing with a pinion 154 to drive a shaft 155 to which the master wheel 144 of the cross-computing unit is secured. The master Wheel 144 drives computing Wheels7 156, which are brought one after another into effective relation 1thereivith as the cross-totalizer passes step by step through the computing zone, The computing wheels 156 are rotatively mounted on a shaft 157 contained Within the cross-totalizer 142, and mesh with dial wheels 153 supported on a shaft 159. l

To cause the cross-totalizer 142 to travel intermittently with the typewriter carriage, or, in other ufords, to travel With the typewriter carriage when a number is to be registered therein, as Well as in one of the column-totalizers, there are provided on the typewriter carriage pick-up elements or dogs 160 on a bar 161. The elements are normally ineffective but may be set to effective positions., corresponding to those of the columntotalizers, by mechanism which will hereinafter be described.

llach effective pick-up dog 160 usually bears relation to the corresponding column-totalizer 63, which is such that immediately prior tc the entrance of a columntotalizer 63 into the computing zone, the

pick-up dog 160 engages with a pick-up hook 162 on a pick-up bar 163 (Fig. 6), included in a train of mechanism extending from the cross-totaliser, sethat the latter may move with the typewriter carriage through the computing zone. The train of mechanism further comprises a rack bar 164, which is drawn by the pick-up bar 163 and meshes with a double gear sector 165 (Fig. 3) to move it about a pivot 166 to rotate a shaft 167 by means of a pinion 168 secured to the latter. rlhe shaft 167 extends from the back to the front of the machine and has at its forward end a pinion 168", meshing with a rack 169 secured to the sub-carriage or cross-computing carriage 170, to move the latter and consequently the crosstotalizer 142 with the column-totalizer 63l and the typewriter carriage. The crosstotalizer 142 remains connected with the typewriter carriage 24 while a computing zone is being traversed. )Vixen the columntotalizer passes out of the computing zone, it becomes disconnected from the typewriter carriage through the relcaseof the pick-up mechanism. and is at once restored to its normal position to the right. of the master wheel 144.

This release of the pick-up mechanism may be effected by a pin 171 on the pick-up bar 163, which engages with a cam 172 'to swing the pick-up bar about its pivotl 173 on the rack 164 to disengage the hook 162 from the pick-up dog 160. vlien this occurs, a return spring 174 coiled a-round the shaft 167 (Fig. 1) becomes effective to rotate 'said shaft and restore the cross-totalizer 142 through the intermediary Vof the pinion' 168% Thecross-computing unit 141 is also provided with a series of carryover pinions 175, which are rotatively mounted on the shaft 155 contained within the actuator 143.

181 to rock a shaft 182 by means of an arm 183, to which the lilik 181 is connected. The shaft 182 isY provided with an arm 184,

which moves the link 185 dowwardly to: This rock a shaft 186 fast to the cam 179. shaft is rocked by means of an arm 187 to which the link 185 is connected. The master wheel 144 is also provided with a detent 188, similar to the detent 103 and actuated by the cam 179.

To assist in accurately positioning the master wheel 144 of the cross-computing unit (Fig. 4), there is vprovided a pawl 189 similar to the pawl 93 'contained within the' master wheels for the column-totalizers and 4 the' cross totalizer, both master wheels usually rotate together when a numeral key is actuated. It is sometimes desired to traverse a computing zone with only a columntotalizer, at which time the cross-'totali/Zer remains idle. I have therefore found it ldesirable to avoid actuating the master wheel of the cross-computing u'nit, except when the cross-totalizer is traversing its computing zone. To do this there are provided normally connections which include a break in the train of mechanism extending between the master wheels of the two computing units. iVhen, however, the cross-totalizer is picked up to traverse the computing zone the connection between the master wheels of the two computing units is made without any attention of the operative.

For this purpose, in the present form of my invention, I have provided at 'the upper end of the cross-computing carriage 17() a plate 191 having a slot therein forming a cam 192, which, when the cross-totalizer occupies its normal position (Fig. 12) maintains a break in the train ofmechanism between the two master wheels, said cam 419,2-being effective through the intermediary of a pin 193 to hold a lever 194 in a position to retain the bevel gear or pinion 145 on the vertical shaft 146 out of range of the two bevel gears 137 and 138 which form part of the train of mechanism between the two' master wheels. The connection between thev lever 194 and the pinion 145 may comprise prongs 197 on the lever 1 94, between which a ange 198 on the pinion 145 engages, so that the pinionmay be moved upoi;v down by the lever 194 tor make and breakthe connection of said train have either one oftwo positions, accordingto whether the column-computing unit is set for addition or subtraction. Therefore, to make the connection between the shafts 186 and 146, the pinion 145 may engage with either one of the pinlons 137 and 138, ac-

cording to the position of theshaft 136.

The connection of said` train of mechapleted before the computing wheel 156 of highest denomination is brought into effec- 4nism between the master wheels is comtive relation with the master wheel 114, and is effected when the pin 193 reaches theend ot the cam 192. To maintain this conneci tion while the cross-totalizer moves through. its computing zone, there is provided a.Y

dwell 19S) at the end of the cam 1S)L..`with` which the pin 193 engages to hold the' bevel gear or pinion 115 in engagement with eithei one of the p'inions 123i", 13S. After the cross-totalizer 142 moves out of the coinpiiting zone, it becomes released from the typewriter carriage, as hereinbefore described, and is returned to its normal position. Duringthe latter part of the return movement of the cross-totalizer, the connection be; tween the shafts 13G 'and 146i? broken by means of a bottom cam 200 of the slot engaging with the pin 193 to swing the lever 191 in a countereloekwise direction to withdraw the bevel gear 115 from effective relation with the shaft 13G.

rl`he beveled gear 1.45 is so connected to the shaft 146 to always rotate therewith and so that it may slide thereon to make or break the connection with the shaft 136. This may be done'l v a collar 201 secured to the shaft 146, and having' a slot 202 into which lingers 203 project from the beveled gear 145, there being one finger on each side of the shaft 146.

The master-wheel driving n'iechanism, as shown in Fig. contained within the actuator 143 of the cross'comj'niting unit, is set to perform the saine kind of computation as that of the column-computing unit; or. in other words. the. state of both computing units is identical. If, however, it is desired to perform a computation in the cross-computing unit, which is the reverse of the computation performed 'by the column-computing unit. irrespective of the state of the column-computing unit. the shaft 150 is moved hngthwise of its axis by a reverse key 201 to disengage the gear wheel 151 from the pinion 152. and bring it into mesh with the pinion 1.51 connected to the master-wheel .shaft 155 to connect thel gear wheel 151 directly with the pinion 154. Thus. if the shaft 150 is now rotated, the rotation of the master wheel 144 will be in an opposite direction to that of the master wheel (32. and thus the computation of the cross-computing unit. will be the reverse of that of the colilimi-computing unit.

1t should he understood that if the reverse key is actuated in the direction of the arrow on an indicator plate 205. when the parts are in the Fig. 2 position` the state of the cross-con'ipuiing unit will be changed to .subtraction by shifting the gear 151. should further be understood that when the column-computing unit is set for subtraction and the revirse key 201V is actuated in the direction of the arrow, the gear wheel 151 will again be shifted into mesh with the pinion 151 to again rotate the master wheel 111 in a reverse direction from that of the master wheel 62 of the coliiinn-computing unit; but it will be remembered that the llatter is'sct for subtraction: therefore, the state of the cross-compiiting unit is changed to addition From the foregoing,y it follows that when the reverse key 201 occupies the extreme left-hand position, Figs. 2 and 3, the compiitatiou performed by the cross-computing unit is identical' v,with .that of the columncomputing'.unit, '.a'nd if it is desired to set the cross-computing unit to perform a reverse computation to that of the columncompiiting unit, the reverse key is moved in thedirection of the arrow to its extreme rightdiand position.

I`o ascertain what.. kind of computation is taking place in the two computing units, or in other words. the state to which each is set. the operative observes the position of the Add key 12,3 and the Sub` key 124. 1t' the add key is in its depressed position, as in Fig. 2, the operative is informed that the column-computing unit is set to addition. The position of the reverse key 201 is then observed, and if in its extreme left-liand position. it informs the operative that the cross-computing unit is set for addition: as it will he remembered that when the reverse ke)T occupies this position` the comj'nitation is identical with that of the column-computing unit. lf. however. the reverse key 204t should at this time occupy its extreme right-hand position, it would indicate to the operative that the cross-computing unit is set for subtraction.

The connection between the reverse key 201 and the shaft 150 may comprise a pin 20G projecting upwardly from a lever 20T forming part of the reverse key 201. The pin 20G projects into au annular groove 20S formed in a collar 209 and secured to the' shaft 150, so that when the reverse key 201 is swung about its pivot 210 the shaft 150 is moved laterally thereby.

The shaft 150 and consequently the gear wheel 151 may be held in either of its shifted positions by means of a detent spring 21.1 secured to the under side of a bracket 212, upon which the reverse key 204 is pivotally mounted. The detent spring 211 is provided with a pin 21.3, which projects through a hole-214 in the bracket 212. and seats itself in any one of two depressions 215 formed on the under side of the .lever 207 which earries the reverse key 201.v

To permit the sliding movement of the shaft 150 relatively to the beveled gear 14a, (Fig. 2). and still retain a rotative connection therewith when the shaft lOis moved by the reverse key 204, the shaft is provided with a key 216 engaging in a slot 217 formed in theJ hub of the beveled gear 149.

To avoid overburdening the carriage-pro-y pelling means, comprising the spring drum 44, by the'load ot' releasing certain locking means associated with the tens-carryover mechanism, I have provided a locking element 218 which may be moved by the typewriter carriage to free the carry-over detents 177, without. adding to the work done by the spring drum,'.l"igs. 1, 3, 5, 11 and 12. This lockingelement, Awhich Ihave shown in connection with-the carry-over mechanism of the cross-computing unit, may be in the form of a bar carried by the cross-computing carriage 170, which normally occupies the position shown in Fig. 11, where it lies in back of all of' the carryover detents 177 and bears a locking relation thereto, Fig. 5. The locking bar is located to lone side of the cross-totalizer 142 so thatwhen the totalizer is moved with the crossflconputing carriage, thelocking bar will move clear of the carry-over detents'to free-them of the lockingbar,f oe :one 'as the crosstotalizer moves stepby-,step-through the computing zone, so "that 'as tens-carry-over may he effected by the carry-over pinions. Vhen the crossftotalizer returns to its normal position, the locking bar will move therewith to the Fig. 11 position, where the carry-over .detents are again locked thereby. lVhen. however, the carry-over detents 177 are freed of the locking bar 218, as during an advancing xmovement of the crosstotalizer, they again become locked by pawls 219 piyotally mounted within the cross totalizer. shown and described in my said co-pending application, Serial No. 24,390, engage with the computing Wheels 156 which are provided with depressions or cut-outs 220, so that when a dial wheel 158 passes through zero, the cut-out 220 on the corresponding computing wheel 156 is opposite the nose 219a on the corresponding pawl 219, which, in effect, forms a Geneva. lock with its wheel, thereby nullifying the locking effect of the pawl on its associated carry-over detent, so that a tens-carry-over from said dial wheel to the dial wheel of next higher denomination may he effected.

T he locking bar 218 may be supported by screws 221 passing through slots 222 in the locking bar and into the cross-totalizer carriage. The slots 222 are elongated to permit an adjustment of the locking bar relatively to the cross-totalizer, las described below; this being desirable, so that the crosstotalizer may be replaced by another having a different number of dial wheels and, consequently, of different width from that in use.

The cross-totalizer may be detachably' hese pawls, similar to those mounted on the cross-totalizer carriage or sub-carriage 170' in any convenient manner, and is located relatively thereto so that the dial wheel ot lowest denomination always has a definite position relative to the subcarriage. This may be done by means of a scalemark 223 and a pointer 224, one of which may be on the subcarriage and the other on the cross-totalizer.

The locking bar 218 is slidingly mounted on the cross-totalizer carriage 170, so that prior to the attaching of the cross-totalizer to the cross-totalizer carriage, itniay be moved to its eXtreme left-hand position against the tension of a sprinod 224g, one end of which is connected to therlocking bar or slide, the other end being connected to the cross-totalizer carriage. After the totalizer has4 been properly positioned by means of the 4pointer 224 and secured in place on the cross-totalizer carriage, the locking bar is permitted to be drawn rightwardly by the spring 224 until the right-hand end-225 of the locking bar strikes the left side of thev cross-totalizer, thus adjusting itself properly relatively to the computing wheels 156. lf desired, the locking bar 218 may then be secured in this position by tightening the screws 221.

Then the cross-totalizer 142 occupies its normal position to the right of the master wheel, the computing wheels 156 are held against accidental displacement by a locking bar 226 arranged to the right of the master wheel. and in alinement with ,the uppermost tooth thereof and also the uppermost teeth of the carry-over pinions175.

.From the foregoing description, it will be understood that when the cross-totalizer is moved leftwardly. the computing wheels 156 and the carry-over pinions 175 are freed of their respective locking bars'226 and 218, as the computing wheels are brought into effective relation with the master wheel and carry-over pinions. The locking bar 226 is made preferably of sheet-metal and secured to the actuator 143.

It is sometimes desired to actuate only` the cross-computing unit. done by first rendering the column-computing unit ineffective. For-this purpose the connection from the driving rack 56 to the master wheel 62 may be broken at will, for which purpose I have providedsimplifiid and improved means. This means may include a rotatable finger-piece 227, Figs. 2, 3, 5, 7 and 8, pivotally supported on a fixed block or cross-bar 226 contained within the actuator 52. To disconnect the master Awheelof the column-computing unit, the

finger-piece 227 is rotated in a clockwise direction from the position indicated in Fig. 2. -A projection 229 thereon engages with a `slide-bar 280 to move the latter right- This may `be wardly. The slide-bar has a downwardly and rearwardlyprojecting finger` 281 engaging between the pinions 59 and 60; thus the slide-bar 230, by means of said finger, moves the pinions 59 and 6l out of range of the extreme right-hand position of the gear-wheel 58, Fig. 7. Thus the connection from the driving .rack to the master wheel is broken, as the gear-wheel 58 in position for adding, if now actuated, will rotate idly.

The mechanism, just described, would not, however, be effective to render the column-computing unit ineffective when gear-wheel 58 is moved to position for subtraction, as a result of the depression of the, subtraction key 124. To insure disconnection between the driving rack and the master wheel. provision may be made to shift pinion 6l away from its normal position in which it would be operatively engaged by gear-wheel 58 when in position for subtraction. To this end l have provided a flange 2552 on the hub of the pinion 66, engaging in an annular groove 23S-l in a hub 234 of the pinion 61. Thus the pinion 6l always moves with the pinions 5S) and 69 when moved laterally` and, when pinion 5) is moved to the position lshown in Fig. T, pinion 6l will be moved to a position such that gear-wheel 58 will not mesh therewith when moved to position for subtraction.

To retain the connection between the master wheel 62 and pinion 61 when the latter is shifted to disconnect the .master wheel, or, in other words, render it ineffective, the lefthand hub of the pinion 6l is provided with slots 235 into which fingers 236 of the master wheel 62 project.

The slide-bar 236 is supported at one end thereof on a cross-bar 237, Fig. 7, and may be held thereon by means of a shouldered screw 238 passing through an elongated slot 23S) formed in one end of the slide bar. Figs. 7 and 8; The other end of the slide-bar is supported on a curved face 240 of the fingerpiece 227 upon which it rides. The slide-bar is also provided with a slot 241 so that it may readily be connected to the finger-piece and actuated thereby throughthe projection 229 which engages in the ends of the slot 241.

To indicate whether the column-computing unit is connected or disconnected, vthe nger-piece is provided with indications "fw and 1), denoting connect and discon neet, respectively. These indications may be viewed through a sight-opening 242 formed in a cover-plate 243 of the actuator 52, Figs. 3 and 7.

To limit the movement of the finger-piece 227 in either direction, there is provided a stop 244 projecting forwardly on the crossbar 228.

To .hold the finger-piece 227, and consequently the parts controlled thereby, n the' ed on the rock shaft 48. mally holds the. connecting lever effecpositions to which they may be shifted, there is provided a detent-spring 245, which is effective to engageon either side of a pin 246 of the finger-piece 227. So that the pin 246 may move well to one side or the other of the detent 245, the finger-piece 22T moves through a greater extent than is required to move the slide-bar 230. For this purpose, l have provided lost-motion between the lug 229 and slot 241,-which form the connection between the fingerpiece and slide-bar, Fig. 8. n

oth computing units may be rendered ineffective, or disconnected. by means of a non. compute key or lever 24T, which is pulled forwardly about its pivot 248 to thrust rear- 'ardly a link 249 connected to the lower end thereof. Said link 249 swings a bell-crank 25() about itspivot 251 to depress a connecting lever or pawl 252 by means of a pin 253, to break the connection between the differential oscillator 47 and the bail 46. The connecting lever is pivotally mounted at 254 on a lever 255,the latter being loosely mountspring 256 nortively connected with the bail 46 by means of a stud 257 projecting from the right-hand side of the bail 46, with which said lever engages. The non-compute lever may be held in any of its positions by any convenient form of friction device or detent. Thus, from the foregoing. it will be understood that when the pawl 252 is in itsdepressed position, the stud 25T will move idly relatively to the oscillator 4T, when the bail 46 is actuated by any one of the numeral keys. lf, however. the pawl 252 is in its raised position, where it is held by the spring 256 to embrace the stud 25T, as seen in Fig. l, the lever 255 is. in effect, directly connected with the bail 46. rlhus, if the bail 46.is actuated b v any one of the numeral keys, the oscillator 4T, comprising the pawl 252 and the lever will transfer an equivalent movement to the master wheel 62, as hereinbefore described.

It will be understood that, while the effect of the automatic making and breaking of the connection between the two master wheels, by means of the beveled gear 145, is entirely independent of the shifting of the noncompute key 247 to its forward or non-compute position, there will be no actuation of the master wheels while the non-compute key is in forward position, and consequently no computation.

The column-stops 41, of which there is one for each letter-space position, may be set by a key 258 at the front of the machine, which, when depressed, swings a lever 259 about a pivot 260 against a return spring 4261. The lever 259 isarranged at one side of the machine, and thrusts downwardly on a link 262 to rock a shaft 263 by means of an arm 264 extending from the latter. The rock shaft 263 has extending therefrom, near the middle of the machine, another arm 265 which' column-'stop 4l, the pick-up element or dog A 160, corresponding to the same letter-space position, may also be set. T o do this, there'is provided 'for the pickup dogs 160, of which there is alsoone for each letter-space position, a setting'tinger 269 forming the upper end of a bell-crank lever-2170, which may be swung about a pivot 271 by means of a link 272; the link 272 being actuated. against the tension of a spring 273 by the link 266, which has a hook 274 overlying a shoulder 275 formed on the link 272. Thev engaging surfaces of the hook 274 and the shoulder 275 are inclined slightly so as to overcome any possible tendency of the connection therebetween to spring apart during a stopsetting and a dog-setting operation.

It is sometimes desired to actuate only the stop-setting finger 268, as, for example, in a position having a column-totalizer arranged ther-eat, in which computations are to be effected without the cross-totalizer. For this purpose, I have provided a key 276 arranged near the front and at the left-hand side of the machine, Fig. 3. This` key, when swung forwardly (Fig. 15) about its pivot 277, swings the link 272 about its point of connection 278 with the bell-crank 270 to move the shoulder 275 clearl of the hook 274 on the stop-setting link 266. Thus, the stop-setting link 266 may-be actuated and the hook 274 thereon moved idly past the shoulder 275.

` The connection between the key 276 and the link 272 may comprise a link 279 guided at its rear end in a plate 280 secured to the machine frame 110 in any convenient man- 11er. The link 279 is provided with a slot 282 into which projects one end of a horizontally-disposed lever 283, so that the latter may be moved about its pivot 284 when thea link 279 is actuated. The lever 283 lies crosswise of the machine, and has its inner end 285 located near the center thereof, projecting into `a slot 286 formed in the lower end of the link 272, thus forming an effective connection to swing the link 272 out of, or into, effective relation with the stop-setting link 266. To guide the lower end of the link 27.2 during the shifting movements thereof, it is providedl with a slot 287 so that it may embrace the link 266. Any convenient means, such as friction of the lever 276 on its pivot 277, may be provided to retain the leverf 276, and consequently the parts controlled thereby, in the positions to which they may be moved.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, l claim:

1. The combination of a totalizer comprising computing elements, and a' locking bar comprising sections, one of which may be extended relatively to the other, so as to increase the length of said locking bar.

2. The' combination of a totalizer comprising computing elements, a locking bar for said computing elements, and means to increase the range of utility of said locking bar.

3. The combination of a totalizer comprising transfer elements, a locking bar for said transfer elements, said locking bar comprising a fixed section and a movable section, said totalizer being adapted to traverse said locking bar and move beyond the end of said fixed section, and means for extending said movable section when said totalizer moves beyond the end of said fixed section. p

4. The combination of a totalizer comprising transfer elements', a locking bar for said transfer elements, said locking bar comprising a fixed section and a movable section, said totalizer being adapted to traverse said locking bar and move beyond the end of said fixed section, and means for extending said movable section when said totalizer moves beyond the end of the said fixed section, each section being tapered at one end to assist inv guiding the transfer elements when they move from-one section to another.

The combination of a totalizer comprising transfer elements, a locking bar for said transfer elements, said locking bar comprisinga fixed section and movable section, said totalizer being adapted to traverse said locking bar and move beyond the end of said fixed section, and means to cause said movable section to travel with said tota'lizer when the latter moves beyond the end of said first-mentioned section.

6. The combination of a carriage, a totalizer comprising transfer elements, andy a locking bar for said transfer elements, said locking bar comprising a fixed section and a movable section, said totalizer being adapted totraverse said locking bar and move beyond the end of said fixed section, the other section beingadapted to travel with said totalizer when the latter moves beyond the end of said fixed section, said movable section. being guided to move parallel to lsaid first-mentioned section.

7. rThe combination of a carriage. a vtotalizer comprising transfer' elements. and a locking bar for said transfer elements. said locking bar comprising a fiXed and a movable section, said totalizer being adapted to traverse said locking lbar and move beyond the end of said fixed section, said carriage being effective to move said movable section to a position where it may lock said transfer elements when said totalizer moves beyond the end of said fixed section.

8. The combination with a carriage, of a totalizer adapted to travel with said carriage through a computing zone, said totalizer comprising transfer elements, and a locking bar having a gap therein at the computing zone, said locking bar being effective to prevent displacement of said transfer elements when said totalizer is traversing said locking .bar except at said computing zone, said locking bar comprising a fixed section and -two movable sections, one at each side of said fixed section adapted to lock said transfer elements when said totalizer travels beyond either end of said locking bar.

S). The combination with a carriage and a column-computing unit comprising a master wheel and one or more totalizers, of a cross-computing unit comprising two elements, namely, a master wheel and a totalizer, normally diconnected means for causing one of said elements to travel relatively to the other and intermittently with said carriage, normally diconnected driving means for the master wheel of said cross-computing unit, and means for connecting .said driving means by movement of the traveling element from normal position.

10. The combination With a carriage and a column-computing unit comprising a master Wheel and one or more totalizers, of a cross-computing unit comprising two elements, namely, a master Wheel and a totalizer, one of said elements being adapted to travel relatively to the other and intermittently with said carriage, normally disconnected driving means for the master wheel of saidcrosscomputing unit, and means for connecting said driving means when said traveling element moves With said carriage.

l1. The combination with a carriage, of two master wheels, a master-Wheel drive, including a driving shaft, for each of said master wheels, totalizers, driving mechanism for one of said driving shafts, a normally ineffective connection between the two shafts, means for automatically rendering effective connection to the other shaft, means, including settable devices on said carriage, for rendering said connection effective at. predetermined positions in the travel of said carriage, and means for reversing the drive between the second driving shaft and the corresponding master wheel 13. The combination of a column-computing unit, a cross-computing unit, each. unit comprising two elements, namely, a totalizer and a master wheel, one of said elements being adapted to travel relatively to the other, the traveling element of said cross-computing unit being adapted to travel intermittently with the. traveling element of said colulnircomputing unit', normally-ineffective driving mechanism for the master wheel of said cross-computing unit, and means for automatically rendering said driving mechanism effective when the tralveling element of said cross-computing unit is to be moved.

14. The combination of a carriage, a column computing unit, a cross computing unit, each unit comprising two elements, namely, a totalizer and a master wheel normally clear thereof, normally -ineffective driving mechanism for the master wheel of said cross-computing unit, and means controlled by said carriage for intermittently rendering said driving mechanism effective by bringing the master wheel and totalizer into coperative relation.

15. The combination of a column-computing unit, a cross-computing unit, each unit comprising two elements, namely, a totalizer and. a master wheel, one of said elements being adapted to travel relatively to the other, the traveling element of said cross-Comput ing unit being adapted to travel intermittently witlrthe traveling element of said column-computing unit, normally-ineffective driving mechanism for the master wheel of said cross-computing unit comprising a shiftable element, and means controlled by said carriage for intermittently rendering said driving mechanism effective, said means comprising a cam and a lever, said lever engaging with said shiftable element of said driving mechanism.

1G. The combination of a carriage, a column computing unit, a cross computing unit, each unit comprising two elements relatively movable, namely, a totalizer and a master wheel, normally-ineffcctive driving mechanism forthe master wheel of said crosscomputing unit, means controlled by said carriage for intermittently rendering said driving mechanism effective, and means for positively maintaining said driving mechanism effective during thc movement of the traveling element of said cross-computing unit.

17. The combination of a carriage, a column computing unit, a cross computing unit, each unit comprising two elements relatively movable, namely, a totalizer and a master wheel,normally-ineffective driving mechanism for the master Wheel of said cross-computinr unit, means controlled by said carriage for intermittently rendering said driving mechanism effective, means for positively maintaining said driving mechanism effective during the movement of the trzweling element of said cross-computing unit, and means for rendering said driving mechanism ineffective when said last-mentioned traveling element returns to its normal position.

18. The combination of a carriage, a totalizer traveling with said carriage, a master wheel for said totalizer, a cross-totalizer, a cross-totalizer carriage, a master wheel forsaid cross-totalizer, means to cause said cross-totalizer carriage to travel intermittently with said first-mentioned carriage, normally-ineffective 'driving mechanism for the master wheel associated With said crosstotalizer, and means actuable by said crosstotalizer carriage for rendering said driving mechanism effective.

19. The combination of a carriage, a totalizer traveling with said carriage, a master wheel for said totalizer, a cross-totalizer, a cross-totalizer carriage, a master wheel for said cross-totalizer, means to cause said cross-totalizer carriage to travel intermittently with said first-mentioned carriage, normally-ineffective driving mechanism for the master wheel associated with said crosstotalizer, said driving mechanism comprising a train of gearing including a slidable pinion, and means including a lever associated with said pinion actuable by-said cross-totali'zer carriage for rendering said driving mechanism effective.

20. The combination with a carriage, of a totalizer traveling with said carriage, a master wheel for said totalizer, driving mechanism for said master wheel, a `cross-totalizer, a master wheel for said cross-totalizer, means 'to cause said cross-totalizer to travel intermittently with said carriage, a normally-open connection between said master wheels. and means controlled by said carriage for closing said connection.

2l. The combination of a carriage, a tofalizer traveling with said carriage, a master wheel for said totalizer, driving mecha nism for said master wheel, a cross-totalizer,a cross-totalizer carriage,a master wheel for said cross-totalizer, means to cause said cross-totalizer carriage to travel intermittently with said first-mentioned carriage, a

normally-ineffective connection between said master wheels, and means actuable by said cross-totalizer carriage for rendering said connection effective. f

22. The combination with a carriage, of

two totalizers, a master wheel for each totalizer, a master-wheel drive, lincluding a driving shaft, associated with each of said master wheels, each driving shaft having a gear thereon, a third shaft, a gear thereon constantly connected to the gear on one of said driving shafts, a gear slidably mounted on the third shaft, and means controlled by said carriage for connecting said slidable gear with the gear on the other of said driving shafts.

23. The combination with a carriage, yof two totalizers, each totalizer having a master wheel, each master wheel having a shaft associated therewith, means, including a cross-computing carriage, for causing a relative traveling movement between one of said` master wheels and its totalizer, means to cause the cross-computing carriage to travel intermittently with the vfirst-named carriage, a sliding member connected with the shaft associated with the cross-computing master wheel, and means controlled by said cross-computing carriage for shifting said slidable member to connect or disconnect the shaft connected therewith with the other of said shafts.

24. The combination with a computingunit comprising two elements, namely, a master wheel and a totalizer, oneof said elements traif'eling relatively to the other, of driving mechanism for said master wheel, means for automatically rendering said driving mechanism effective when said two elements are brought into coperative relation, a non-compute key, and means controlled from said non-compute key to 4nullify the effect of said automatic means.

25. The combination with a carriage, of a column-totalizer traveling with said carriage, a master wheel for said. column-totalizer, driving mechanism for said master wheel, a cross-totalizer, a master wheel for said cross-totalizer, means to cause said cross-totalizer lto travel intermittently with said carriage, a normally-open connection between said master wheels, means controlled by said carriage for closing said connection, numeral keys, a t 'ain of mechanism actuable by and extending from said numeral keys to the master wheel for said colnmn-totalizer, and a non-compute key. said key being effective to nullify the effect of the connection-closing means.

Q6. In a computing machine, the combination of a master wheel` driving mechanism for said master wheel, and means to cause a change in said driving mechanism to enable the master wheel to be reversely rotated, said means comprising a slidable shaft, a single key engaging directly with said shaft, a detent--coperating' with said key, and an indicator for said key.

27. In a computing machine` the combination of a master wheel, driving mechanism forsaid master Wheel, a second master wheel,`.a train of mechanism from one mas ter Wheel to the other, and means to cause a change in said train of mechanism to enable the second-mentioned master wheel to be reversely rotated relatively to the other, said means comprising a slidable shaft, a single key engaging directly with said shaft, a detent coperating with said key, and an indicator for said key. i

28. The combination of a totalizer adapt- ,ed to move through a computing zone, carryover elements, a device common to all of said carry-over elements to maintain the latter locked while said totalizer is outside of the computing zone, and means moved by the totalizer as it travels step by step to move said device to free said carry-over elements from controlfof said device, one by one.

29. The combinationnvith a carriage, of a totalizer settable thereon, carry-over elements relatively to which the carriage moves, locking means yfor said carry-over elements on said carriage adapted to free said carry-over elements, one by one, as the carriage moves step by step, and means for mounting said locking means to permit the setting oi' the totalizer to properly position the locking means along the carriage.

30. The combination of a carriage, a totalizer, a cross-adding carriage for said totalizer adapted to travel with said carriage through a computing zone, a master wheel 'for said totalizer, driving mechanism 'for the master wheel, a normally open connection between the driving mechanism and 'the master wheel, means for intermittently connecting the cross-adding carriage to the first carriage to cause"it to travel therewith, and means for automatically closing the iirst connection by movement of the cross-adding carriage.

3l. rlihe combination of a main carriage, a sub-carriage, a totalizer adapted to move through a computing zone, carry-overl elements, a locking device for all ot said carryover elements, said. device being carried by said sub-carriage, and means controlled by said main carriage for moving said. subrarriagc to free said carry-over elements o'j said locking device, one by one, as the .totalizer moves step by step through the conniuting Zone,

32. rthe combination ,of a carriage, a totali/3er adapted to move through a computing zona carry-over elements .fixed against traveling movementn and a slide-bar common to all of said carry-over elements to maintain the latter locked, said slide-bar being adapted to travel with said carriage to Ylrce said carry-over elements ot said slide-bar as the totalizer passes through the computing licone.

33. The combination of a carriage, a

totalizer adapted to move through a computing raone, carry-over Wheels, elements cngaging with said wheels, .and a slide-bar common to all of said elements to maintain said carry-over Wheels locked, said slide-bar being adapted to travel with said carriage to free said elements of said slide-bar as the totalizer passes through the computing Zone.

34. The combination of a totalizer mov able through a computing zone, a series of movable elements placed alongside of each otherL a. common locking bar for said elements, and means for freeing said elements of said locking bar, one after another, as the totalizer traverses the computing zone.

35. The combination with a totalizer comprising computing Wheels, of carry-over mechanism comprising a series of carry-over elements, detents for said carry-over elements, a member associated with each of said computing Wheels, means on each of said computing wheels to position, except for one of a plurality of positions of each computing Wheel, the corresponding member to hold in locking position a detent which is in position to be controlled thereby, a locking device common to all of said detents,

and means to free said detents one by one from the control of said locking device and bring said detents under the control of said members associated with said computing Wheels immediately upon release by said locking device. v

36. The combination With column-totalizers, Aof a cross-totalizer having computing Wheels and adapted to travel intermittently through a computing Zone, and an element to prevent accidental displacement of said computing` Wheels While said cross-totalizer occupies its normal position. outside of the computing zone.

37. The combination with column-totalizers, of a cross-totalizer having computing Wheels, a master wheel for said cross-totalizer, said cross-totalizer being adapted to travel intermittently with said columntotalizers to traverse said master Wheel, and means, including' a locking bar engaging the computing` wheels, to prevent accidental displacement thereofy when said crosstotalizer is in its :normal position, and to treo said computing Wheels, one at a time, as they are brought into effective relation with said master Wheel..

The combination with a totalizer com prising conipiuing Wheels, oli a :master wheel, carry-over pinions, a locking bar to prevent accidental displacement oit said computingI wheels when said totalizer is in difillt] 

